Message - Re: 3D contours

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Posted by  Per Corell on September 09, 2003 at 23:56:49:

In Reply to:  3D contours posted by Zee on September 09, 2003 at 18:54:06:

Many years ago, when I got the first AutoCAD, I had the exact same problem. I wanted to point out 2 or 3D lines to form a complicated boat hull , I maby needed 12 or 20 different lines to define the shape , somtimes only 6 to get the lines smooth , ------ but AutoCAD only offered mesh entities formed from max 4 lines, and those even shuld have meeting endpoints . Then there are rulesurf and edgesurf but none of these realy work forming a complicated boat shape.
The solution I had to find, was to read all the manuals where I among other fancy tools found, that hidden among the mesh creation rutines was one, that you couldn't use with a strait keyboard or digitizer input, but it accepted an number of input defination points big enough, to define all the boat hulls , you will se at the link.
You maby find simular applications on the web, as AutoDesk set aside just the "3Dmesh" command for application develobers, ------ now I don't know if one of the newer AutoCAD versions now offer this feature I work with ver 14, ---- but the way around is a program in one of the application languages AutoCAD will accept. I got my application working and at the same time develobed an unfolding, an 3D transformation and several other design tools , that you will need when you work 3D with AutoCAD. but this don't help you.
I will suggest that you check 3D's that offer this feature even from imported defination lines, ---- you then export the resulting mesh if you want to stay in AutoCAD, or check out if Rhino or one of the other cheaper CAD programs offer this feature with an option fo exporting in a common format, acturly I am quite sure Rhino will create mesh entities like that , from individual defination lines.
--------- I decided one day to offer the tools I produced years ago but that day isn't yet beside, some of my own tools , ask you to know how the application is written, so points are feeded in the right order, sure the applications can be covered by another shell "looking at" the point values and deciding what end of a 3D poly shuld vome next, but you know it work and I can use my own applications.
-------- btw it is not that difficult to write a Lisp application around the 3Dmesh function in AutoCAD.
Check the link if you want to se what mesh entities can be generated _and_ unfolded into panels.

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